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Relative radiation correction method for medium-wave infrared focal plane array detector

A technology of relative radiation correction and array detectors, which is applied in radiation pyrometry, optical radiation measurement, instruments, etc., can solve the problem of low relative radiation calibration accuracy of mid-wave infrared focal plane array detectors, and achieve strong engineering application significance Effect

Active Publication Date: 2015-12-30
CHINA CENT FOR RESOURCES SATELLITE DATA & APPL
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, to provide a relative radiation calibration method of the mid-wave infrared focal plane array detector, and to solve the relative radiation calibration accuracy of the mid-wave infrared focal plane array detector in the background technology. low technical issues

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  • Relative radiation correction method for medium-wave infrared focal plane array detector
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  • Relative radiation correction method for medium-wave infrared focal plane array detector

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Embodiment Construction

[0018] (1) The radiation response model of the detector is established: according to the imaging principle of the mid-wave infrared focal plane array detector, the noise of the imaging link is fully considered sound source , to establish the radiation response model of the mid-wave infrared focal plane array detector;

[0019] DN(m,n)=f[L(m,n)]+N f (m,n)+N w (m, n)①

[0020] =f[L(m,n)]+N(m,n)

[0021] Mode Middle: m, n is the probe position m∈[1, M] of the mid-wave infrared focal plane array detector,

[0022] n ∈ [1, N];

[0023] DN(m, n) is the original digital DN value of the probe (m, n);

[0024] f[L(m,n)] is the function of the radiance L(m,n) received by the probe (m,n);

[0025] N f (m, n) is the generalized 1 / f noise of the probe (m, n);

[0026] N w (m, n) is the white noise of the probe (m, n);

[0027] N(m,n)=N f (m,n)+N w (m, n) is the total noise of detector (m, n).

[0028] (2) On-board blackbody calibration and imaging: complete the imaging of t...

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Abstract

The invention provides a relative radiation correction method for a medium-wave infrared focal plane array detector. The relative radiation correction method comprises the steps that a detector radiation responding model is firstly built, and then imaging on a variable high-temperature blackbody radiation source and a low-temperature blackbody radiation source is completed to obtain a DN value of a corresponding array detector; wavelet transformation is performed on the DN value of the array detector, a wavelet coefficient of generalized 1 / f noise is estimated according to the counting self-similarity characteristic of the generalized 1 / f noise, then the obtained wavelet coefficient is shrunk through a wavelet soft threshold method, and finally wavelet inverse transformation is performed on the shrunk wavelet coefficient to obtain a medium-wave infrared focal plane array detector DN value after the generalized 1 / f noise is separated is obtained; the noise amplitude is calculated; noise removal is performed on DN values of variable high-temperature blackbody and low-temperature blackbody data; a relative radiation calibration coefficient is obtained through calculation; a relative radiation correction image of the array detector is obtained according to image data obtained by the array detector.

Description

technical field [0001] The invention relates to a relative radiation correction method of a mid-wave infrared focal plane array detector, in particular to a relative radiation correction method of a mid-wave infrared focal plane array detector equipped with an on-board blackbody calibration device. Background technique [0002] The temperature of the earth's surface is generally 300K, and the radiation energy of the earth's surface is basically in the band above 3.0 μm. The mid-wave infrared focal plane array detector uses the space optical system to collect the mid-wave infrared radiation energy of 3.0 μm to 5.0 μm, which has the ability to penetrate smoke , dust, fog, snow, and the ability to identify camouflage, and can conduct quasi-all-weather observations in day and night. Temperature, ocean surface temperature, day and night cloud, coastline monitoring and other civil applications have a wide range of applications. [0003] However, because the mid-wave infrared foca...

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Application Information

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IPC IPC(8): G01J5/52
Inventor 王爱春傅俏燕闵祥军陆书宁潘志强李晓进韩启金张学文刘李李照洲
Owner CHINA CENT FOR RESOURCES SATELLITE DATA & APPL
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